Function assertTooltipInstance

src/material/tooltip/tooltip.spec.ts:1724–1729

Asserts whether a tooltip directive has a tooltip instance.

(tooltip: MatTooltip, shouldExist: boolean)

/** Asserts whether a tooltip directive has a tooltip instance. */
function assertTooltipInstance(tooltip: MatTooltip, shouldExist: boolean): void {
  // Note that we have to cast this to a boolean, because Jasmine will go into an infinite loop
  // if it tries to stringify the `_tooltipInstance` when an assertion fails. The infinite loop
  // happens due to the `_tooltipInstance` having a circular structure.
  expect(!!tooltip._tooltipInstance).toBe(shouldExist);
}

function finishCurrentTooltipAnimation(overlayContainer: HTMLElement, isVisible: boolean) {
  const tooltip = overlayContainer.querySelector('.mat-mdc-tooltip')!;